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Find largest file in Linux server using “du”

Short on diskspace? You can use ‘du’ to find largest files in your linux server using ‘du’ tool.

 

du --total -sh /path/*

Additionally you can also include a ‘threshold’ parameter to list only file larger than the unit which you’ve specified, by using “-t” parameter.

Example, list files larger than 100MB

du --total -sh -t100M /path/*

You can use “M” for megabytes, “G” for gigabytes and “P” for Petabytes. Positive number denotes files must be at least the specified size. Negative number means the files must be at most the specified size.

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Easily find duplicate files in Linux with fdupes

‘fdupes’ is a handy tool to find and list duplicates file in GNU/Linux or Unix-like operating system.

In Ubuntu you can install fdupes using apt command-line tool

apt -y install fdupes

Usage of fdupes is simple enough, just write:

fdupes -r /path/to/files/

The command will list duplicate files in the “/path/to/files”directory, which is a prime candidate for deletion.

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Get Free PHP and MySQL Hosting with InfinityFree

For those who are seeking free web hosting to test their PHP / MySQL application can look into InfinityFree.net service which has interesting offers:

  • 99% uptime
  • No advertisement
  • PHP 7.0
  • MySQL 5.6
  • Includes FTP account access (rare !!)
  • Up to 10 Email Account
  • Apache 2.4 with .htaccess
  • 400 MySQL database
  • User can add their own domain
  • Free DNS service (including custom CNAME and MX record)
  • Unlimited Disk space and Bandwidth
  • Support Cloudflare CDN
  • Support SSL Certificate

The main advantages which entice me to InfinityFree are their support for SSL Certificate, 99% uptime guarantees and support for adding own domain name with their own free DNS.

The support for SSL certificate means that you can host Telegram Bot, Google Map web application and web app which utilizes OAuth API!

A rare sight for a completely free web hosting provider.

The only downside for InfinityFree is the free hosting only support up to 50,000 hits on the web server, which is fair by me as the free hosting could provide a good playground for Students and Web App Enthusiast to experiment with their code.

 

 

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How to export SQLite3 database to *.sql file

Here’s a quick way to export SQLite3 database to *.sql text file.

sqlite3 this.db .dump > this-db.sql

The command is useful for exporting SQLite database to standard ANSI .sql which can be imported into other database management system such as Oracle, MariaDB/MySQL, etc

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How to analyze 404 HTTP code from weblogs

The dreaded 404 HTTP code means page not found. However multiple 403 and 404 on weblogs also can also mean there are attempts to crack the website.

The awk script down here can be useful tool to analyze weblogs and identify multiple attempts at cracking the web application.

 

awk '($9 ~ /404/)' access.log | awk '{print $7}' | sort | uniq -c | sort -n

The script can also be tweaked for other HTTP status code too.